Correlation and path co-efficient analysis in okra (Abelmoschus esculentus Linn.) genotypes

B. Chandramouli, M. Paratpara Rao, D. Shrihari, A.V.D. Dorajee Rao
Okra (Abelmoschus esculentus Linn.) is an important vegetable crop under coastal Andhra Pradesh conditions. There are plenty of genotypic resources for this crop. Genotypic evaluation is a continuous process directed towards achieving progress in crop improvement activity. Under the present investigation, correlation and path coefficient analysis was carried out among 30 okra genotypes (including two checks) which revealed that the magnitude of genotypic correlation coefficients was higher than phenotypic correlation coefficients, for the quantitative traits that were studied. The most important economic trait, fruit yield plant-1 exhibited positive and significant correlation with plant height, number of primary branches plant-1, number of nodes on main stem, intermodal length, number of fruits plant-1, fruit length, fruit girth, number of pickings and picking duration at both phenotypic and genotypic levels indicating the importance of these traits in selection for yield. Path coefficient analysis was performed taking the fruit yield plant-1 as dependent variable. It was revealed from the results that intermodal length, fruit length, days to first picking, petiole length, picking duration, node at which first flower appeared, fruit girth, number of pickings and number of nodes on main stem exerted a high positive direct effect on fruit yield plant-1. The high direct effect of these traits appeared to be the main factors for their strong association with fruit yield plant-1. The magnitude of direct effects by these traits is indicative of the effectiveness of direct selection based on such traits.
Chandramouli, B., Paratpara Rao, M., Shrihari, D. and Dorajee Rao, A.V.D. (2019). Correlation and path co-efficient analysis in okra (Abelmoschus esculentus Linn.) genotypes. Acta Hortic. 1241, 221-230
DOI: 10.17660/ActaHortic.2019.1241.31
character association, direct effect, path coefficient analysis, yield attributes, okra, phenotypic correlation, genotypic correlation

Acta Horticulturae